EP2572150A2 - Method of operating a refrigeration system for a mobile cargo container - Google Patents

Method of operating a refrigeration system for a mobile cargo container

Info

Publication number
EP2572150A2
EP2572150A2 EP11718874A EP11718874A EP2572150A2 EP 2572150 A2 EP2572150 A2 EP 2572150A2 EP 11718874 A EP11718874 A EP 11718874A EP 11718874 A EP11718874 A EP 11718874A EP 2572150 A2 EP2572150 A2 EP 2572150A2
Authority
EP
European Patent Office
Prior art keywords
cargo container
refrigeration system
mobile cargo
door
refrigerated mobile
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11718874A
Other languages
German (de)
French (fr)
Other versions
EP2572150B1 (en
Inventor
Mark Fragnito
John D. Ward, Jr.
Deborah Champagne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Original Assignee
Carrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carrier Corp filed Critical Carrier Corp
Publication of EP2572150A2 publication Critical patent/EP2572150A2/en
Application granted granted Critical
Publication of EP2572150B1 publication Critical patent/EP2572150B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating devices
    • B60H1/00007—Combined heating, ventilating, or cooling devices
    • B60H1/00014—Combined heating, ventilating, or cooling devices for load cargos on load transporting vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
    • B60P3/20—Refrigerated goods vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2106—Temperatures of fresh outdoor air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/02—Sensors detecting door opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer

Definitions

  • Exemplary embodiments pertain to the art of refrigeration systems and, more particularly, to a refrigeration control system for a mobile cargo container.
  • the method includes sensing a temperature outside of the refrigerated mobile cargo container, detecting a position of a door on the refrigerated mobile cargo container, and activating the refrigeration system if the door is open and the temperature outside of the refrigerated mobile cargo container is less than a predetermined value.
  • a refrigerated mobile cargo container including a door, a door position sensor configured and disposed to detect a position of the door, a temperature sensor configured and disposed to detect a temperature outside of the refrigerated mobile cargo container, a refrigeration system selectively operable to condition an interior storage zone of the refrigerated mobile cargo container, and a controller operatively coupled to the door position sensor, temperature sensor and the refrigeration system. The controller selectively activating the refrigeration system based on inputs from the door position sensor and the temperature sensor.
  • FIG. 1 depicts a refrigerated mobile cargo container in accordance with an exemplary embodiment
  • FIG. 2 depicts a flow diagram illustrating a method of operating a refrigeration system for the refrigerated mobile cargo container of FIG. 1.
  • Refrigerated mobile cargo container 2 includes a body 4 including a plurality of walls 6-8 that define an interior storage zone 10 having a floor 12 and an opening 14. As will be discussed more fully below, interior storage zone 10 is temperature controlled to preserve goods stored therein. Refrigerated mobile cargo container 2 is also shown to include doors 16 and 18 as well as wheels 20 and forward supports 22.
  • refrigerated mobile cargo container 2 includes a controller 40 having a processor or CPU 42 and a memory 44. Controller 40 is operatively connected to a refrigeration system 48 that is configured to condition internal temperatures of interior storage zone 10. Controller 40 is also operatively connected to a temperature sensor 50 and a door sensor 52. Temperature sensor 50 is configured to detect ambient temperatures, or temperatures outside of refrigerated mobile cargo container 2. Door sensor 52 is configured to detect a position of doors 16 and 18. Door sensor 52 signals controller 40 when doors 16 and/or 18 are in an open position and a closed position. Controller 40 is also shown to be coupled to an input device 54 that is configured to communicate with memory 44. As will be detailed more fully below, input device 54 enables a user to select various options for operating refrigeration system 48.
  • controller 40 activates refrigeration system 48 in one of a high speed operation or a low speed operation, as indicated in block 90, dependent upon cooling demand. If, programmed for low speed operation, controller 40 activates refrigeration system 48 at low speed as indicated in block 91.
  • controller 40 is programmed to operate refrigeration system 48 in a low speed mode. If controller 40 is not programmed to operate refrigeration system 48 in the low speed mode, refrigeration system 48 is shut down as indicated in block 94. If, however, controller 40 is programmed to operate refrigeration system 48 in the low speed mode, refrigeration system 48 is either powered down to low speed operation, or low speed operation is continued if already established. In addition to the above, controller 40 is programmed for various delays to avoid repeated cycling of refrigeration system 48 in the event door 16 and/or 18 is repeated opened and closed during a short time interval.
  • the exemplary embodiments provide a system for operating a refrigeration system for a refrigerated mobile cargo container to minimize fuel use and to lower emissions.
  • Refrigeration systems are operated continuously during loading to ensure any goods stored in the interior storage zone remain at or near a desired temperature. However, this continued operation may be costly and result in high emissions as loading may take several hours.
  • Other prior art systems trigger changes in operating parameters of the refrigeration system based on ambient temperature. For example, ambient temperature sensing is used to control operational speed of a compressor. When ambient temperatures are low, the compressor need not work at full capacity. However, during loading, when the doors are open, such systems run continuously, usually at high speed. Continuous operation, regardless of the speed, leads to higher emissions and increase operational costs.
  • the exemplary embodiments cease operation of the refrigeration system during periods when ambient temperatures are at or below desired levels and activate the refrigeration system when ambient temperatures are above the desired levels. In this manner, fuel costs and emissions associated with operation of the refrigeration system during loading of the refrigerated mobile cargo container are minimized.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

A method (80) of operating a refrigeration system (48) for a refrigerated mobile cargo container (2) includes sensing a temperature outside of the refrigerated mobile cargo container (2), detecting a position of a door (16, 18) on the refrigerated mobile cargo container (2), and activating the refrigeration system (48) if the door (16, 18) is open and the temperature outside of the refrigerated mobile cargo container (2) is less than a predetermined value.

Description

METHOD OF OPERATING A REFRIGERATION SYSTEM FOR A MOBILE CARGO
CONTAINER
BACKGROUND OF THE INVENTION
[0001] Exemplary embodiments pertain to the art of refrigeration systems and, more particularly, to a refrigeration control system for a mobile cargo container.
[0002] Currently, many manufacturers of goods that require refrigeration rely upon carriers to supply refrigerated mobile cargo containers including a refrigeration system to transport the goods to market. The refrigerated mobile cargo containers are parked at the manufacturer and loaded with the goods. Generally, it can take several hours to fully load a refrigerated mobile cargo container before it is ready for shipment. While being loaded, doors on the refrigerated mobile cargo container typically remain open. As such, manufacturers typically require that the refrigeration system remain operational while the refrigerated mobile cargo container is being loaded.
BRIEF DESCRIPTION OF THE INVENTION
[0003] Disclosed is a method of operating a refrigeration system for a refrigerated mobile cargo container. The method includes sensing a temperature outside of the refrigerated mobile cargo container, detecting a position of a door on the refrigerated mobile cargo container, and activating the refrigeration system if the door is open and the temperature outside of the refrigerated mobile cargo container is less than a predetermined value.
[0004] Also disclosed is a refrigerated mobile cargo container including a door, a door position sensor configured and disposed to detect a position of the door, a temperature sensor configured and disposed to detect a temperature outside of the refrigerated mobile cargo container, a refrigeration system selectively operable to condition an interior storage zone of the refrigerated mobile cargo container, and a controller operatively coupled to the door position sensor, temperature sensor and the refrigeration system. The controller selectively activating the refrigeration system based on inputs from the door position sensor and the temperature sensor. BRIEF DESCRIPTION OF THE DRAWINGS
[0005] The following descriptions should not be considered limiting in any way. With reference to the accompanying drawings, like elements are numbered alike:
[0006] FIG. 1 depicts a refrigerated mobile cargo container in accordance with an exemplary embodiment; and
[0007] FIG. 2 depicts a flow diagram illustrating a method of operating a refrigeration system for the refrigerated mobile cargo container of FIG. 1.
DETAILED DESCRIPTION OF THE INVENTION
[0008] A detailed description of one or more embodiments of the disclosed apparatus and method are presented herein by way of exemplification and not limitation with reference to the Figures.
[0009] With reference to FIG. 1, a refrigerated mobile cargo container in accordance with an exemplary embodiment is indicated generally at 2. Refrigerated mobile cargo container 2 includes a body 4 including a plurality of walls 6-8 that define an interior storage zone 10 having a floor 12 and an opening 14. As will be discussed more fully below, interior storage zone 10 is temperature controlled to preserve goods stored therein. Refrigerated mobile cargo container 2 is also shown to include doors 16 and 18 as well as wheels 20 and forward supports 22.
[0010] In accordance with an exemplary embodiment, refrigerated mobile cargo container 2 includes a controller 40 having a processor or CPU 42 and a memory 44. Controller 40 is operatively connected to a refrigeration system 48 that is configured to condition internal temperatures of interior storage zone 10. Controller 40 is also operatively connected to a temperature sensor 50 and a door sensor 52. Temperature sensor 50 is configured to detect ambient temperatures, or temperatures outside of refrigerated mobile cargo container 2. Door sensor 52 is configured to detect a position of doors 16 and 18. Door sensor 52 signals controller 40 when doors 16 and/or 18 are in an open position and a closed position. Controller 40 is also shown to be coupled to an input device 54 that is configured to communicate with memory 44. As will be detailed more fully below, input device 54 enables a user to select various options for operating refrigeration system 48.
[0011] Reference will now be made to FIG. 2 in describing a method 80 of controlling refrigeration system 48. Initially, a determination is made in block 82 whether user inputs/preferences are received through input device 54. If no inputs are received, default values are set in block 84 and a determination is made in block 86 whether door 16 and/or door 18 is open. If user input is received, any selected preferences are stored in memory 44 and door position determination is made in block 86. If door 16 and/or door 18 is sensed to be open, temperature sensor 52 is polled to determine whether the ambient or outside temperature is below either a default value or a user selected value stored in memory 44 as indicated in block 88. If the ambient temperature is above the default value or user selected value, a determination is made in block 89 whether controller 40 is programmed for low speed operation. If, not programmed for low speed operation, controller 40 activates refrigeration system 48 in one of a high speed operation or a low speed operation, as indicated in block 90, dependent upon cooling demand. If, programmed for low speed operation, controller 40 activates refrigeration system 48 at low speed as indicated in block 91.
[0012] If in block 88 it is determined that the ambient temperature is below the default or user selected value, a determination is made in block 92 whether controller 40 is programmed to operate refrigeration system 48 in a low speed mode. If controller 40 is not programmed to operate refrigeration system 48 in the low speed mode, refrigeration system 48 is shut down as indicated in block 94. If, however, controller 40 is programmed to operate refrigeration system 48 in the low speed mode, refrigeration system 48 is either powered down to low speed operation, or low speed operation is continued if already established. In addition to the above, controller 40 is programmed for various delays to avoid repeated cycling of refrigeration system 48 in the event door 16 and/or 18 is repeated opened and closed during a short time interval.
[0013] At this point it should be understood that the exemplary embodiments provide a system for operating a refrigeration system for a refrigerated mobile cargo container to minimize fuel use and to lower emissions. Refrigeration systems are operated continuously during loading to ensure any goods stored in the interior storage zone remain at or near a desired temperature. However, this continued operation may be costly and result in high emissions as loading may take several hours. Other prior art systems trigger changes in operating parameters of the refrigeration system based on ambient temperature. For example, ambient temperature sensing is used to control operational speed of a compressor. When ambient temperatures are low, the compressor need not work at full capacity. However, during loading, when the doors are open, such systems run continuously, usually at high speed. Continuous operation, regardless of the speed, leads to higher emissions and increase operational costs. The exemplary embodiments cease operation of the refrigeration system during periods when ambient temperatures are at or below desired levels and activate the refrigeration system when ambient temperatures are above the desired levels. In this manner, fuel costs and emissions associated with operation of the refrigeration system during loading of the refrigerated mobile cargo container are minimized.
[0014] While the invention has been described with reference to an exemplary embodiment or embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the claims.

Claims

What is claimed is:
1. A method (80) of operating a refrigeration system (48) for a refrigerated mobile cargo container (2), the method (80) comprising:
sensing a temperature outside of the refrigerated mobile cargo container (2);
detecting a position of a door (16,18) on the refrigerated mobile cargo container (2); and
deactivating the refrigeration system (48) if the door is (16,18) open and the temperature outside of the refrigerated mobile cargo container (2) is less than a
predetermined value.
2. The method of claim 1, further comprising: operating the refrigeration system at low speed if the door is open, the temperature outside of the refrigerated mobile cargo container is below a predetermined value, and the refrigeration system is programmed for low speed operation.
3. The method of claim 1, further comprising: operating the refrigeration system (48) at a low speed mode if the door is (16,18) open and the temperature outside of the refrigerated mobile cargo container (2) is greater than the predetermined value.
4. The method of claim 1, further comprising: selectively operating the refrigeration system at one of a high speed and a low speed if the temperature outside of the refrigerated mobile cargo container is greater than the predetermined value.
5. The method of claim 1, further comprising: selectively inputting the predetermined value into a controller (40) operatively connected to the refrigeration system (48).
6. A refrigerated mobile cargo container (2) comprising:
a door (16,18);
a door position sensor (52) configured and disposed to detect a position of the at least one door (16,18);
a temperature sensor (50) configured and disposed to detect a temperature outside of the refrigerated mobile cargo container (2);
a refrigeration system (48) selectively operable to condition an interior storage (10) portion of the refrigerated mobile cargo container (2); and
a controller (40) operatively coupled to the door position sensor (52), temperature sensor (50), and the refrigeration system (48), the controller (40) selectively activating the refrigeration system (48) based on inputs from the door position sensor (52) and the temperature sensor (50).
7. The refrigerated mobile cargo container according to claim 6, further comprising: an input device (59) operatively coupled to the controller (40), the input device (59) facilitating user inputs to the controller (40).
EP11718874.8A 2010-05-19 2011-05-02 Method of operating a refrigeration system for a mobile cargo container Active EP2572150B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34631510P 2010-05-19 2010-05-19
PCT/US2011/034745 WO2011146230A2 (en) 2010-05-19 2011-05-02 Method of operating a refrigeration system for a mobile cargo container

Publications (2)

Publication Number Publication Date
EP2572150A2 true EP2572150A2 (en) 2013-03-27
EP2572150B1 EP2572150B1 (en) 2018-04-25

Family

ID=44626243

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Application Number Title Priority Date Filing Date
EP11718874.8A Active EP2572150B1 (en) 2010-05-19 2011-05-02 Method of operating a refrigeration system for a mobile cargo container

Country Status (4)

Country Link
US (1) US9163872B2 (en)
EP (1) EP2572150B1 (en)
DK (1) DK2572150T3 (en)
WO (1) WO2011146230A2 (en)

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Also Published As

Publication number Publication date
WO2011146230A3 (en) 2012-04-12
WO2011146230A2 (en) 2011-11-24
EP2572150B1 (en) 2018-04-25
DK2572150T3 (en) 2018-06-06
US20130055730A1 (en) 2013-03-07
US9163872B2 (en) 2015-10-20

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